Receiving antenna scanning diversity system with controllable switching
AssigneeFUBA Automotive GmbH & Co. KG
InventorsHeinz Lindenmeier, Jochen Hopf, Leopold Reiter
Life of this patent
Estimating the term…
Abstract
A receiving antenna system for vehicles that eliminates interference in receiving signals. The interference detector is disposed within the receiver and generates and transmits an indicating signal, or a signal derived therefrom. Such signal can be formed in several different ways, and in the site of the antenna installation, it can be converted into a switching signal that only effects the switching condition in the antenna installation having a controllable switching circuit.
Claims20
A receiving antenna scanning diversity system with a controllable switching circuit for vehicles operating in the meter wave range with an antenna installation (21) and a receiver (20) connected to the antenna installation via an antenna line (12) and antenna connection site (22), the antenna installation (21) having reception properties and including a plurality of individual antenna parts (A1, A2, . . . An), the system comprising:
- an interference detector (18) disposed within the receiver (20) and adapted to detect interference in a receiving signal (23) and an intermediate frequency signal (19), said detector generating an indicating signal (10) upon detection of interference;
- a switching circuit (11) disposed within the antenna installation (21) and having a plurality of controllable selector switches (5) and a plurality of change-over switches (8), said switching circuit (11) changing the reception properties of the antenna installation (21) by switching the position of at least one of said selector (5) and change-over switches (8), the switching position of at least one of said switches (5, 8) changing the receiving signal (23) present in the antenna connection site (22), the switching position being repeated until said indicating signal (10) indicates no interference;
- a signal line (24) coupled between the receiver (20) and the antenna installation (21) and adapted to transmit said indicating signal (10) to said switching circuit (11);
- said switching circuit (11) receiving said indicating signal (10) via said signal line (24) and operating in conjunction with said interference detector (18) to change the switching position of said selector and change-over switches (5, 8) based on reception interference detected in the received signal (23) and the intermediate-frequency signal (19);
- a high frequency generator (27) disposed within the receiver (20) and coupled to said interference detector (18), said generator forming a signal burst (28) of high frequency through analysis of said indicating signal (10) or a control signal (26) derived therefrom;
- and
- an electronic switch (25) disposed within the receiver (20) and coupled to said high frequency generator (27), said indicating signal (10) switching the intermediate frequency signal (19) through to signal line (24) via said electronic switch (25), and wherein said signal burst (28) includes a high-frequency oscillation formed by the intermediate-frequency signal (19).
A receiving antenna scanning diversity system with a controllable switching circuit for vehicles operating in the meter wave range with an antenna installation (21) and a receiver (20) connected to the antenna installation via an antenna line (12) and antenna connection site (22), the antenna installation (21) having reception properties and including a plurality of individual antenna parts (A1, A2, . . . An), the system comprising:
- an interference detector (18) disposed within the receiver (20) and adapted to detect interference in a receiving signal (23) and an intermediate frequency signal (19), said detector generating an indicating signal (10) upon detection of interference;
- a switching circuit (11) disposed within the antenna installation (21) and having a plurality of controllable selector switches (5) and a plurality of change-over switches (8), said switching circuit (11) changing the reception properties of the antenna installation (21) by switching the position of at least one of said selector (5) and change-over switches (8), the switching position of at least one of said switches (5, 8) changing the receiving signal (23) present in the antenna connection site (22), the switching position being repeated until said indicating signal (10) indicates no interference;
- a signal line (24) coupled between the receiver (20) and the antenna installation (21) and adapted to transmit said indicating signal (10) to said switching circuit (11), wherein the antenna installation (21) further comprises antenna part connections (14) connected to said change-over switches (8), said antenna part connections (14) are loaded with a plurality of different impedances (7) by said change-over switches (8);
- and
- said switching circuit (11) receiving said indicating signal (10) via said signal line (24) and operating in conjunction with said interference detector (18) to change the switching position of said selector and change-over switches (5, 8) based on reception interference detected in the received signal (23) and the intermediate-frequency signal (19).
A receiving antenna scanning diversity system with a controllable switching circuit for vehicles operating in the meter wave range with an antenna installation (21) and a receiver (20) connected to the antenna installation via an antenna line (12) and antenna connection site (22), the antenna installation (21) having reception properties and including a plurality of individual antenna parts (A1, A2, . . . An), the system comprising:
- an interference detector (18) disposed within the receiver (20) and adapted to detect interference in a receiving signal (23) and an intermediate frequency signal (19), said detector generating an indicating signal (10) upon detection of interference;
- a switching circuit (11) disposed within the antenna installation (21) and having a plurality of controllable selector switches (5) and a plurality of change-over switches (8), said switching circuit (11) changing the reception properties of the antenna installation (21) by switching the position of at least one of said selector (5) and change-over switches (8), the switching position of at least one of said switches (5, 8) changing the receiving signal (23) present in the antenna connection site (22), the switching position being repeated until said indicating signal (10) indicates no interference;
- a signal line (24) coupled between the receiver (20) and the antenna installation (21) and adapted to transmit said indicating signal (10) to said switching circuit (11), wherein the antenna line (12) is combined with said signal line (24), and said indicating signal (10) is transmitted superimposed on said receiving signal (23) on an output of the receiver (20) to antenna installation (21) via the combined line (12, 24);
- and
- said switching circuit (11) receiving said indicating signal (10) via said signal line (24) and operating in conjunction with said interference detector (18) to change the switching position of said selector and change-over switches (5, 8) based on reception interference detected in the received signal (23) and the intermediate-frequency signal (19).
A receiving antenna scanning diversity system with a controllable switching circuit for vehicles operating in the meter wave range with an antenna installation (21) and a receiver (20) connected to the antenna installation via an antenna line (12) and antenna connection site (22), the antenna installation (21) having reception properties and including a plurality of individual antenna parts (A1, A2, . . . An), wherein the antennas (A1, A2, . . . An) are formed by a heating field (6) within the windowpane (1) of a vehicle, the system comprising:
- an interference detector (18) disposed within the receiver (20) and adapted to detect interference in a receiving signal (23) and an intermediate frequency signal (19), said detector generating an indicating signal (10) upon detection of interference;
- a switching circuit (11) disposed within the antenna installation (21) and having a plurality of controllable selector switches (5) and a plurality of change-over switches (8), said switching circuit (11) changing the reception properties of the antenna installation (21) by switching the position of at least one of said selector (5) and change-over switches (8), the switching position of at least one of said switches (5, 8) changing the receiving signal (23) present in the antenna connection site (22), the switching position being repeated until said indicating signal (10) indicates no interference;
- a signal line (24) coupled between the receiver (20) and the antenna installation (21) and adapted to transmit said indicating signal (10) to said switching circuit (11);
- a first and a second antenna part connections (14 and 15) formed by connections to the heating field (6);
- amplifiers (2) having an input selectively coupled to at least one of said second antenna part connections (15) to form active antennas, and an output connected to said selector switch (5);
- and
- said switching circuit (11) receiving said indicating signal (10) via said signal line (24) and operating in conjunction with said interference detector (18) to change the switching position of said selector and change-over switches (5, 8) based on reception interference detected in the received signal (23) and the intermediate-frequency signal (19).
A receiving antenna scanning diversity system with a controllable switching circuit for vehicles operating in the meter wave range with an antenna installation (21) and a receiver (20) connected to the antenna installation via an antenna line (12) and antenna connection site (22), the antenna installation (21) having reception properties and including a plurality of individual antenna parts (A1, A2, . . . An), wherein the antennas (A1, A2, . . . An) are formed by a heating field (6) within the windowpane (1) of a vehicle, the system comprising:
- an interference detector (18) disposed within the receiver (20) and adapted to detect interference in a receiving signal (23) and an intermediate frequency signal (19), said detector generating an indicating signal (10) upon detection of interference;
- a switching circuit (11) disposed within the antenna installation (21) and having a plurality of change-over switches (8), said switching circuit (11) changing the reception properties of the antenna installation (21) by switching the position of at least one of change-over switches (8), the switching position of at least one of said switches (8) changing the receiving signal (23) present in the antenna connection site (22), the switching position being repeated until said indicating signal (10) indicates no interference;
- a signal line (24) coupled between the receiver (20) and the antenna installation (21) and adapted to transmit said indicating signal (10) to said switching circuit (11);
- a first and a second antenna part connections (14 and 15) formed by connections to the heating field (6);
- at least one amplifier (2) having an input selectively coupled to said second antenna part connection (15) to form active antennas, and an output connected to said antenna connection site (22);
- and
- said switching circuit (11) receiving said indicating signal (10) via said signal line (24) and operating in conjunction with said interference detector (18) to change the switching position of said change-over switches (8) based on reception interference detected in the received signal (23) and the intermediate-frequency signal (19).
A receiving antenna scanning diversity system with a controllable switching circuit for vehicles operating in the meter wave range with an antenna installation (21) and a receiver (20) connected to the antenna installation via an antenna line (12) and antenna connection site (22), the antenna installation (21) having reception properties and including a plurality of individual antenna parts (A1, A2, . . . An), the system comprising:
- an interference detector (18) disposed within the receiver (20) and adapted to detect interference in a receiving signal (23) and an intermediate frequency signal (19), said detector generating an indicating signal (10) upon detection of interference;
- a switching circuit (11) disposed within the antenna installation (21) and having a plurality of controllable selector switches (5) said switching circuit (11) changing the reception properties of the antenna installation (21) by switching the position of at least one of said selector switches(5), the switching position of at least one of said switches (5) changing the receiving signal (23) present in the antenna connection site (22), the switching position being repeated until said indicating signal (10) indicates no interference;
- a signal line (24) coupled between the receiver (20) and the antenna installation (21) and adapted to transmit said indicating signal (10) to said switching circuit (11), wherein the antenna line (12) is combined with said signal line (24), and said indicating signal (10) is transmitted superimposed on said receiving signal (23) on an output of the receiver (20) to antenna installation (21) via the combined line (12, 24);
- and
- said switching circuit (11) receiving said indicating signal (10) via said signal line (24) and operating in conjunction with said interference detector (18) to change the switching position of said selector switches (5) based on reception interference detected in the received signal (23) and the intermediate-frequency signal (19).
Dependencies are inferred from the claim text.